08-Jun-2016, 11:51 AM
Hi, here's something I've been wondering for a while. Can I do a little antenna modding to RX's to improve their range/reliability?
First off, here's a picture of three receivers I have. Let's number top to bottom (ie black, orange, black) #1, #2 and #3.
On a bit of a side note we can see that the antennas on #1 and #2 are separated by 90 degrees which I believe should be better because then it matters less at which angle the quad is to the TX because the RX will choose the strongest signal. Is this correct? Would it then help to resolder one of the antennas on #3 to be at straight angles with the other?
Antenna length. All three RX's have antennas of roughly 3,1242cm, which is a quarter wavelength of 2.4Ghz. Could I improve the range by soldering on antennas of half or full wavelength?
One more question which I hope I can ask in an understandable manner. I've seen some RX's with what looks like a shielded lead as to have the sensitive part of the antenna be moved away from the RX hardware a bit. As an example see this RX on Banggood:
Here's a few annotations:
Am I correct in thinking that the shielded part is not counting as the antenna length, but that we should start counting the antenna length where the shielding stops? I'm assuming that the shielding needs to be grounded. If this is the case, I'm wondering if I can mod my RX's from the top pic to have longer leads and possible a shielded middle part, so that I can have the antenna sticking out of the quad, away from other hardware.
Looking forward to your replies. It feels like a noobie question but hopefully there's others wondering the same thing. Thanks!
First off, here's a picture of three receivers I have. Let's number top to bottom (ie black, orange, black) #1, #2 and #3.
On a bit of a side note we can see that the antennas on #1 and #2 are separated by 90 degrees which I believe should be better because then it matters less at which angle the quad is to the TX because the RX will choose the strongest signal. Is this correct? Would it then help to resolder one of the antennas on #3 to be at straight angles with the other?
Antenna length. All three RX's have antennas of roughly 3,1242cm, which is a quarter wavelength of 2.4Ghz. Could I improve the range by soldering on antennas of half or full wavelength?
One more question which I hope I can ask in an understandable manner. I've seen some RX's with what looks like a shielded lead as to have the sensitive part of the antenna be moved away from the RX hardware a bit. As an example see this RX on Banggood:
Here's a few annotations:
Am I correct in thinking that the shielded part is not counting as the antenna length, but that we should start counting the antenna length where the shielding stops? I'm assuming that the shielding needs to be grounded. If this is the case, I'm wondering if I can mod my RX's from the top pic to have longer leads and possible a shielded middle part, so that I can have the antenna sticking out of the quad, away from other hardware.
Looking forward to your replies. It feels like a noobie question but hopefully there's others wondering the same thing. Thanks!